Apparatus for regulating a color dosing device in relation to a color doctor roller

ABSTRACT

Apparatus for controlling a color dosing device in relation to a color doctor roller wherein the entire color dosing device, under retention of the support line between the color knife and the color profile lever is pivotable about a fulcrum point for the purpose of setting the color slot, characterized in that for the purpose of changing the blade angle or clearance the entire color dosing device is pivoted about the fulcrum point without changing the color slot and the fulcrum point is shifted a distance corresponding to the change in the color slot whereby the individual color profile levers which act on the edge of a color knife are separately pivoted for setting the color profile and all of the color profile levers are jointing pivoted for parallel setting of the color knife and color profile storage.

United States vPatent Johne et al.

[72] Inventors: Hans Johne; Giinter Schumann; Kurt Reichenberger, all ofRadebeul, Germany [73] Assignee: Veb Druckmaschinenwerk Planeta,Badebeul, Germany 22 Filed: March 6,1970 21 Appl.No.: 17,094

[30] Foreign Application Priority Data [451 Oct. 10, 1972 2,140,95012/1938 Blackley .....;....1o1/36s FOREIGN PATENTS OR APPLICATIONS863,346 1/1953 Germany ..l0l/365 116,596 ll/l924 Switzerland 101/365Primary Examiner- J. Reed Fisher AttorneyNolte and Nolte [57] ABSTRACTApparatus for controlling a color dosing device in I relation to a colordoctor roller wherein the entire color dosing device, under retention ofthe support line between the color knife and the color profile lever ispivotable about a fulcrum point for the purpose of setting the colorslot, characterized in that for the purpose of changing the blade angleor clearance the entire color dosing device is pivoted about the fulcrumpoint without changing the color slot and the fulcrum point is shifted adistance corresponding to the change in the color slot whereby theindividual color profile levers which act on the edge of a color knifeare separately pivoted for setting the color profile and all of thecolor profile levers are jointing pivoted for parallel setting of thecolor knife and color profile storage.

7 Claims, 7 Drawing Figures PATENTEDnm 10 I972 SHEET 1 [IF 3 #4010" Jamf INVENTORS PATENTEDBBT 1 I912 3.696743 SHEET 3 or 3 v INVENTORS HANSJOHNE GUNTER SCHUMANN KURT REICHENBERGER APPARATUS FOR REGULATING ACOLOR DOSING DEVICE IN RELATION TO A COLOR DOCTOR ROLLER This inventionrelates to an apparatus for regulating a color dosing device inrelationto a color doctor roller wherein the positioning of the flexible colorknife with respect to the doctor roller and the color profile settingare brought about through interconnecting color zone screws and levers.

A color dosing device is known in which the color profile setting isbrought about through zone screws and/or through zone screws andinterconnecting levers operating on the color knife. The setting of thecolor slot takes place in that through a bolting of the color dosinginstallation abouta fulcrum, i.e. through the pivoting thereby madepossible the operational angle can also be changed.

ln order to set the color slot without any appreciable change of theoperational angle, the color knife by means of a color knife carryingadjustment device without any pivoting is displaced with respect to thecolor doctor roller.

In order to set the operational angle, i.e. bring about a change to adifferent angular degree, the color dosing device is first tilted orinclined and thereafter the necessary readjustment of the color slot isbrought about through a displacement of the color knife.

The disadvantage of the foregoing known construction is that inoperating the same, the free end of the color knife is removed from thepoint of application of the color zone screws, respectively the colorprofile levers and consequently in the actual printing operation thecolor knife is forced away from the color doctor roller when theprinting involves the use of highly concentrated, viscous colors. As aresult a change in the conduction of color by the color dosing deviceoccurs at varying printing speeds.

The color dosing is generally carried out at relatively low machinespeeds and consequently the printer, that is the machine operator mustadjust, i.e., correct the color dosing to the predetermined actualprinting machine speeds. This has to be done by adjusting the colorprofile by means of the color zone screws and also by adjusting theamount of color for instance by changing in the conventional manner thehub of the doctor roller to correspond to the continuous printing speed.As a result, the setting of the color dosing device is associated withthe in connection therewith and with the fact that the operationallayout design of the modern color printing machine which operate withdoctor lifts of up to 90 cannot be utilized. Similarly, the settingpossibility of adjusting the lever strips to their maximal length forforming a film in the color roller arrangement can also not be utilized.

Lastly, there is the disadvantage associated with the known color dosingdevices in that they have no facilities for storage of the set colorprofile. The storage of the set colorprofile is, however, advantageousin those instances, for example, in which for the control of a newcylinder setting it becomes necessary to print sheets and then theactual production must be completed with the thusly set color profile.

The object of the invention is to improve the setting of color dosingdevices to achieve a higher quality printing result and at the sametime, to reduce the cost associated with the setting itself.

. It is another object of the invention to provide an arrangement forsetting the color profile, color slot and the operational angle of acolor dosing device under maintenance of the support line between thecolor knife and color profile levers and at'the same time, to provide anarrangement for storage of the color profile.

In accordance with the invention, these and other objects are achievedin that for setting of the color slot, the entire color dosinginstallation is pivoted around a fulcrum with maintenance of the supportline between the color knife and the color profile levers. I

For changing the operational angles without changing the color slot, thecomplete installation is pivoted about a fulcrum point and this point,or the part of the color dosing device carrying the color knife, isshifted a distance corresponding to the change of the color slot. Forsetting the color profile the individual color profile levers whichoperate the color knife edge are separately moved and for parallelsetting of the color knife color profile storate setting all of thecolor profile levers are jointly moved.

In accordance with the invention, the entire color dosing device ispivotally arranged on eccentrics which are movably disposed on atraverse bar and the eccentricity of which in direction and amount isproportional to the change of the color slot when the operational angleis changed.

Furthermore, the color profile levers which act on the color knife edgeare provided with stop faces for color zone screws and with stop facesfor a movable parallel storage bar which is movable in the color dosingdevice perpendicular, to the stop faces by the storage screws.

In accordance with another embodiment of the in-.

vention, the total color dosing installation is pivotable on anadjustable rocker arm and the device for setting the rocker arm isarranged to act in a direction perpendicular to the rocker arm.

In the embodiment of the invention, hereinafter illustrated in H6. 6,the part of the color dosing device carrying the color knife isdisplaceably positioned on a part of the color dosing device which inturn is pivotally attached on a shaft.

The color dosing device is provided with a control device abutting witha stop arranged securely in "the stand or support of the device, saidcontrol device consisting of a rotatable bushing provided in the colordosing device having an inner thread and a knurled collar in whichbushing there is disposed a spacing bolt having a fine, that is, aprecision thread and a graduated measuring indicator. An angle forpreventing the rotational movement of this spacing bolt is pressedagainst the flattened part of the spacing bolt.

ln order to create the contact pressure between the control device ofthe color dosing device and the stop securely mounted in the support,the center of gravityv of the color dosing device is located between thetraverse bar and the color doctor roller. In order to increase thecontact pressure, a pressure spring is provided on a movably disposedspring rod contained in the color dosing device which spring pressesover a removable, i.e., insertable wedge against a stop securely mountedin the structure.

The invention will be further illustrated by actual embodiments thereofdescribed in detail with reference to the drawings in which:

FIG. 1 is a side elevational view of the color dosing device in section,showing setting through rotatably arranged eccentrics;

FIG. 2 is a section along line 2-2 of FIG. 1;

FIG. 13 is a setting device in accordance with the invention shown insection; a

FIG. 4 is a schematic representation of principle of the setting of thecolor dosing device showing setting 1 via the movable rocker arm;

FIG. 5 is a schematic representation of the principle for setting thecolor dosing device showing setting over an alignable fulcrum point;

FIG. 6 is a schematic showing of the reverse solution of the principle:as shown in FIG. 5; and 7 FIG. 7 is a view of the whole of the printingmachine inside elevation;

Each of thesetting arrangements, and namely color slot, operating angle,and color profile setting refer to a changingin the position of thecolor knife of .the color dosing device 2 with respect to the colordoctor roller 3 under retention ofthe support line between the colorknife 1 and the color profile levers 4.

In the embodiment shown in FIGS. 1-3, the color dosing device 2 isrotatably disposed oneccentrics 5 for carrying out the changes in the,color slot and the operational angle. These eccentrics 5 areinterconnected and rotatably disposed on a traverse bar 6. Theinterconnected eccentrics 5 are'provided with a setting lever 7 andasetting screw 8 for coupling, that is connecting the eccentrics withthe traverse bar.

In order to set the color slot a, the color dosing device 2 is pivotedon eccentrics 5 while the eccentrics 5 are connected with the traversebar 6. The changes in color slot are made in fractions of 1 mm so thatthe resultant change of the operational angle is negligible.

In order toset the operational angle of the color dosing device, theeccentrics 5 are locked together with the setting screw 8 on thetraverse bar 6.'The change in the operational angle which takes placewith the change of the color slot is compensatedfor by the turning ofthe eccentricsS following release of the setting screw 8. Theeccentricity e of the eccentrics corresponds indirection and amount tothe change of the color slot which occurs with the change in theoperational angle. 7

The. setting movements required for the color slot change and..theoperational angle change are initiated through a control device which isprovided in the color dosing device 2.

The control device consists of a bushing 10 which is mounted forrotation in the color dosing device 2 which bushing is provided with aninternal thread and a knurled collar 9. The bushing is also providedwith a spacing bolt 11 which .in turn is provided with a precisionthread and a graduated measuring indicator. The spacing bolt 11 has aflat portion 12 against which an angle 13iis. pressed, the latter beingfirmly secured to the colo r dosing device 2 so that any rotation of thespacing bolt 11 isprevented. There is, thusly provided means whereby arotation of the bushing 10 results in a shifting of the spacing bolt 11.The spacing bolt of the setting device presses against a stop 14 whichis securely mounted in the structure. The point of gravity of the colordosing device is located between the traverse bar 6 and the color doctorroller 3 and, therefore, the spacing bolt 11 is in every possiblesituation pressed against the stop 14. For supporting the contact force,the color dosing device is provided with a spring 16 which is disposedon 'a spring rod 15 which is displaceably mounted in the colordosing'device. This spring 16 pressesvia a removably insertable wedge 17against a stop 18 which is securely arranged in the structure.

In case, the complete color dosing device is to be pivoted, as forexample, as required for cleaning purposes, the spring 16 must bereleased by shifting the spring bar 15 and removing the insertable wedge17.

The setting of the color profile is carried out through a setting ofthe. color knife 1 which takes place via color profile levers 4operating the color knife edge 19. The color profile levers 4 aremounted for .rotation in the color dosing device and have stop faces 20for the individual color zone screws 21 and also stop faces 22 for aparallel storage bar 23 which is movable perpendicularly to the stopfaces in the color dosing device. The movement of the parallel storagebar 23 is controlled through storage screws 24.

The operation of the storage device takes place in the following manner.The color profile required in connection with the individualprinting isset by the color zone screws 21, i.e. the color profile levers 4 whichare arranged one next to the other over the entire width'of the colordosing device exhibit different positions.

For complying with the technical requirements of printing, for instance,controlling of the adjustment, the printer frequently is forced to printindividual sheets. ,In this case, the storage bar 23-is shifted by meansof storage screw 24, in other words, all of the color profile levers arebrought into the same position and the color knife 1 is set parallel bythis action. The color zone screws 21 'in this case retain theirsettings. After withdrawing the storage screws 24, the color profilelevers 4 are pressed against the color zone screws 21 through theresilient nature of the color knife 1, which means that the colorprofile levers 4 are pressed in their original position.

FIGS. 4-6, there are shown in the form of schematic representations,theprinciples of different possibilities I for changing the color slotand the operational angle.

In the embodiment of FIG. 4,.the entire color dosing device 2 ispivotable on an adjustable rocker arm 25. The setting of the rocker armtakes place by means of a setting device 26 which acts on the arm in asubstantially perpendicular direction.

In the embodiment shown in FIG. 5,. the entire color dosing device 2 ispivotally disposed on a movable slide 27 (movable from left to right andvice versa).

In the embodiment shown in FIG. 6, the part 30 of the color dosingdevice 2 carrying the color knife 1 is slidably positioned on part 29which in turn is pivotally The color to be transferred to the sheet iscontained in a color dosing device 2 andis transferred by means ofvarious color rollers 36 to the plate cylinder 37 carrying the printingform. According to the manner of the making up of the printing form,there then takes place a color transfer onto the rubber cylinder 33. Inorder that satisfactory printing results be obtained, it is necessarythat the color dosing device 2 be provided with a number ofpossibilities for adjusting the same.

What is claimed is:

1. In a sheet fed printing press, an automatic control device forcontrolling color dosing means in relation to a color doctor rollerwherein for setting of the color slot the entire color device is mountedfor pivoting movement about a fulcrum under retention of the supportline between the color knife and color profile levers, said color dosingmeans being pivotally mounted for pivoting of said entire color dosingmeans on pivotable eccentrics, said eccentrics being mounted on atraverse, the eccentricity of said eccentrics being proportional indirection and amount to the change of the color slot resulting from anychange in operational setting angle, color profile levers beingoperatively associated with the edge of said color knife, said colorprofile levers being provided with first impact surfaces, color zonescrews adapted for striking said first impact surfaces of said colorprofile levers, said color profile levers having second impact surfaces,storage bar means mounted for movement perpendicular to said secondimpact surfaces and storage screws for said storage bar, said storagebar being adapted for movement by said storage screws for striking saidsecond impact surfaces of said color profile levers.

2. Apparatus according to claim 1, wherein said control dosing means arearranged abutting a stop firmly mounted in said control dosing device,said control means comprising a bushing mounted for rotation in saidcontrol dosing device, said bushing including internal thread means anda knurled collar, spacing bolt means provided with precision threadmeans and graduated indicator means being additionally provided in saidbushing, said spacing bolt means having a flattened portion, wedge meansfor inhibiting rotational movement of said spacing bolt being securelymounted for pressing contact with said flattened portion of said spacingbolt in said control dosing means.

1 3. Apparatus according to claim 1, wherein the center of gravity ofsaid color dosing device is located between said traverse and said colordoctor roller, spring means, means for displaceable movement in saidcolor dosing means, said spring means being mounted on spring rod means,insertable wedge means and stop means, said spring means being adaptedfor abutting contact with said stop means via said insertable wedgemeans. I

4. Apparatus according to claim 1, wherein said color dosing means ispivotally mounted for pivoting of said entire color dosing means ondisplaceable rocker arm means means for controlling the displacement ofsaid rocker arm means operatively associated with said rocker arm meansand being arranged substantially I perpendicular to said rocker armmeans.

5. Apparatus according to claim 1, wherein means are provided on saidcolor dosing device for carrying said color knife, said means beingarranged for lateral movement on means pivotally mounted on a shaftprovided in said color dosing device,

6. Apparatus according to c arm 5, wherein said control dosing means arearranged abutting a stop firmly mounted in said control dosing device,said control means comprising a bushing mounted for rotation in saidcontrol dosing device, said bushing including internal thread means anda knurled collar, spacing bolt means provided with precision threadmeans and graduated indicator means being additionally provided in saidbushing, said spacing bolt means having a flattened portion, wedge meansfor inhibiting rotational movement of said spacing bolt being securelymounted for pressing contact with said flattened portion of said spacingbolt in said control dosing means.

7. Apparatus according to claim 5, wherein the center of gravity of saidcolor dosing device is located between said traverse and said colordoctor roller, spring means, means fordisplaceable movement in saidcolor dosing means, said spring means being mounted on spring rod means,insertable wedge means and stop means, said spring means being adaptedfor abutting contact with said stop means via said insertable wedgemeans.

1. In a sheet fed printing press, an automatic control device forcontrolling color dosing means in relation to a color doctor rollerwherein for setting of the color slot the entire color device is mountedfor pivoting movement about a fulcrum under retention of the supportline between the color knife and color profile levers, said color dosingmeans being pivotally mounted for pivoting of said entire color dosingmeans on pivotable eccentrics, said eccentrics being mounted on atraverse, the eccentricity of said eccentrics being proportional indirection and amount to the change of the color slot resulting from anychange in operational setting angle, color profile levers beingoperatively associAted with the edge of said color knife, said colorprofile levers being provided with first impact surfaces, color zonescrews adapted for striking said first impact surfaces of said colorprofile levers, said color profile levers having second impact surfaces,storage bar means mounted for movement perpendicular to said secondimpact surfaces and storage screws for said storage bar, said storagebar being adapted for movement by said storage screws for striking saidsecond impact surfaces of said color profile levers.
 2. Apparatusaccording to claim 1, wherein said control dosing means are arrangedabutting a stop firmly mounted in said control dosing device, saidcontrol means comprising a bushing mounted for rotation in said controldosing device, said bushing including internal thread means and aknurled collar, spacing bolt means provided with precision thread meansand graduated indicator means being additionally provided in saidbushing, said spacing bolt means having a flattened portion, wedge meansfor inhibiting rotational movement of said spacing bolt being securelymounted for pressing contact with said flattened portion of said spacingbolt in said control dosing means.
 3. Apparatus according to claim 1,wherein the center of gravity of said color dosing device is locatedbetween said traverse and said color doctor roller, spring means, meansfor displaceable movement in said color dosing means, said spring meansbeing mounted on spring rod means, insertable wedge means and stopmeans, said spring means being adapted for abutting contact with saidstop means via said insertable wedge means.
 4. Apparatus according toclaim 1, wherein said color dosing means is pivotally mounted forpivoting of said entire color dosing means on displaceable rocker armmeans means for controlling the displacement of said rocker arm meansoperatively associated with said rocker arm means and being arrangedsubstantially perpendicular to said rocker arm means.
 5. Apparatusaccording to claim 1, wherein means are provided on said color dosingdevice for carrying said color knife, said means being arranged forlateral movement on means pivotally mounted on a shaft provided in saidcolor dosing device.
 6. Apparatus according to claim 5, wherein saidcontrol dosing means are arranged abutting a stop firmly mounted in saidcontrol dosing device, said control means comprising a bushing mountedfor rotation in said control dosing device, said bushing includinginternal thread means and a knurled collar, spacing bolt means providedwith precision thread means and graduated indicator means beingadditionally provided in said bushing, said spacing bolt means having aflattened portion, wedge means for inhibiting rotational movement ofsaid spacing bolt being securely mounted for pressing contact with saidflattened portion of said spacing bolt in said control dosing means. 7.Apparatus according to claim 5, wherein the center of gravity of saidcolor dosing device is located between said traverse and said colordoctor roller, spring means, means for displaceable movement in saidcolor dosing means, said spring means being mounted on spring rod means,insertable wedge means and stop means, said spring means being adaptedfor abutting contact with said stop means via said insertable wedgemeans.